Accelerating method of self-healing for scratches
A method of accelerating self-healing includes contacting a scratched portion of a self-healing urethane(meth)acrylate-derived material with a plasticizing solvent, wherein the plasticizing solvent comprises water, an alcohol, a ketone, or a combination thereof.
1. A method of accelerating self-healing, comprising:
contacting a scratched portion of a self-healing urethane(meth)acrylate-derived material with a plasticizing solvent,
wherein the plasticizing solvent comprises water, an alcohol, a ketone, or a combination thereof.
2. The method of claim 1 , wherein the contacting of the scratched portion of the self-healing urethane(meth)acrylate-derived material with the plasticizing solvent comprises:
dripping the plasticizing solvent on the scratched portion,
attaching a material in which the plasticizing solution is absorbed to the scratched portion, or
dipping the scratched portion in the plasticizing solvent.
3. The method of claim 1 , wherein a scratch in the scratched portion is self-healed in about 10 seconds to about 72 hours.
4. The method of claim 1 , wherein the method of accelerating self-healing comprises contacting the scratched portion of the self-healing urethane(meth)acrylate-derived material with the plasticizing solvent for about 10 seconds or longer.
5. The method of claim 1 , further comprising removing the plasticizing solvent remaining in the scratched portion after contacting the scratched portion of the self-healing urethane(meth)acrylate-derived material with the plasticizing solvent.
6. The method of claim 5 , wherein a scratch in the scratched portion is self-healed in less than or equal to about 12 hours after removing the plasticizing solvent.
7. The method of claim 1 , wherein a scratch in the scratched portion is formed by a pencil having a hardness of 4B to 9H at a load of 1 kilogram-force.
8. The method of claim 1 , wherein the self-healing urethane(meth)acrylate-derived material is a cured product of a self-healing composition comprising a urethane(meth)acrylate compound.
9. The method of claim 8 , wherein the urethane(meth)acrylate compound has two (meth)acrylate groups and six or more urethane groups.
10. The method of claim 9 , wherein the urethane(meth)acrylate compound is a reaction product of a C1 to C20 aliphatic diisocyanate, a C1 to C100 aliphatic diol, and a C1 to C20 hydroxyalkyl(meth)acrylate.
11. The method of claim 9 , wherein the urethane(meth)acrylate compound is represented by Chemical Formula 1:
wherein, in Chemical Formula 1,
n is a numeral of 2 to 30,
R 1 is hydrogen or a methyl group,
R 2 and R 3 are each independently a substituted or unsubstituted C1 to C20 alkylene group, or a substituted or unsubstituted C3 to C20 cycloalkylene group, and
R 4 is a substituted or unsubstituted C1 to C10 alkylene or a C2 to C100 divalent functional group comprising an ether group, an ester group, or a combination thereof.
12. The method of claim 8 , wherein the self-healing composition further comprises a polyhedral oligomeric silsesquioxane.
13. The method of claim 12 , wherein the polyhedral oligomeric silsesquioxane is a polyhedral oligomeric silsesquioxane substituted with a phenyl group.
14. The method of claim 12 , wherein an amount of the polyhedral oligomeric silsesquioxane is about 0.1 weight percent to about 20 weight percent, based on a total solid content of the self-healing composition.
15. The method of claim 1 , wherein the self-healing urethane(meth)acrylate-derived material is in a film form.
16. The method of claim 15 , wherein the film has a thickness of about 10 micrometers to about 500 micrometers.
17. The method of claim 15 , wherein the self-healing urethane(meth)acrylate-derived material is a protective film disposed on a surface of a device.
18. The method of claim 17 , wherein the protective film further comprises an anti-fingerprinting coating layer disposed on at least one surface of the protective film.
19. The method of claim 17 , wherein the self-healing urethane(meth)acrylate-derived material has a light transmittance of greater than or equal to about 80%, a yellowness index of less than or equal to about 3, and a haze of less than or equal to about 5%.
20. The method of claim 17 , wherein the self-healing urethane(meth)acrylate-derived material is a protective film on a surface of a window of a flexible display device.